diff --git a/Misc/NEWS b/Misc/NEWS
index 27a05648cc6..b844fd9305a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #24847: Removes vcruntime140.dll dependency from Tcl/Tk.
+
 - Issue #24839: platform._syscmd_ver raises DeprecationWarning
 
 What's New in Python 3.5.0 release candidate 1?
diff --git a/PCbuild/get_externals.bat b/PCbuild/get_externals.bat
index 3037326129f..f9b740fa6aa 100644
--- a/PCbuild/get_externals.bat
+++ b/PCbuild/get_externals.bat
@@ -55,9 +55,9 @@ for %%e in (
             bzip2-1.0.6
             nasm-2.11.06
             openssl-1.0.2d
-            tcl-core-8.6.4.1
-            tk-8.6.4.1
-            tix-8.4.3.4
+            tcl-core-8.6.4.2
+            tk-8.6.4.2
+            tix-8.4.3.6
             sqlite-3.8.11.0
             xz-5.0.5
             ) do (
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 9d5f342e9e7..68cdb0ffbc6 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -236,7 +236,7 @@ _sqlite3
     Homepage:
         http://www.sqlite.org/
 _tkinter
-    Wraps version 8.6.1 of the Tk windowing system.
+    Wraps version 8.6.4 of the Tk windowing system.
     Homepage:
         http://www.tcl.tk/
 
diff --git a/PCbuild/tcl.vcxproj b/PCbuild/tcl.vcxproj
index 8f2544a74e6..e9287c7b37d 100644
--- a/PCbuild/tcl.vcxproj
+++ b/PCbuild/tcl.vcxproj
@@ -61,7 +61,8 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   
   <PropertyGroup>
-    <TclOpts Condition="$(Configuration) == 'Debug'">symbols</TclOpts>
+    <TclOpts>ucrt</TclOpts>
+    <TclOpts Condition="$(Configuration) == 'Debug'">symbols,ucrt</TclOpts>
     <TclDirs>INSTALLDIR="$(OutDir.TrimEnd(`\`))" INSTALL_DIR="$(OutDir.TrimEnd(`\`))"</TclDirs>
     <DebugFlags Condition="'$(Configuration)' == 'Debug'">DEBUGFLAGS="-wd4456 -wd4457 -wd4458 -wd4459 -wd4996"</DebugFlags>
     <NMakeBuildCommandLine>setlocal
diff --git a/PCbuild/tcltk.props b/PCbuild/tcltk.props
index 96bd5777b8e..5e794e55375 100644
--- a/PCbuild/tcltk.props
+++ b/PCbuild/tcltk.props
@@ -5,7 +5,7 @@
     <TclMajorVersion>8</TclMajorVersion>
     <TclMinorVersion>6</TclMinorVersion>
     <TclPatchLevel>4</TclPatchLevel>
-    <TclRevision>1</TclRevision>
+    <TclRevision>2</TclRevision>
     <TkMajorVersion>$(TclMajorVersion)</TkMajorVersion>
     <TkMinorVersion>$(TclMinorVersion)</TkMinorVersion>
     <TkPatchLevel>$(TclPatchLevel)</TkPatchLevel>
@@ -13,7 +13,7 @@
     <TixMajorVersion>8</TixMajorVersion>
     <TixMinorVersion>4</TixMinorVersion>
     <TixPatchLevel>3</TixPatchLevel>
-    <TixRevision>4</TixRevision>
+    <TixRevision>6</TixRevision>
     <tclDir>$(ExternalsDir)tcl-core-$(TclMajorVersion).$(TclMinorVersion).$(TclPatchLevel).$(TclRevision)\</tclDir>
     <tkDir>$(ExternalsDir)tk-$(TkMajorVersion).$(TkMinorVersion).$(TkPatchLevel).$(TkRevision)\</tkDir>
     <tixDir>$(ExternalsDir)tix-$(TixMajorVersion).$(TixMinorVersion).$(TixPatchLevel).$(TixRevision)\</tixDir>
diff --git a/PCbuild/tix.vcxproj b/PCbuild/tix.vcxproj
index 74a6b84f573..1786324c2c6 100644
--- a/PCbuild/tix.vcxproj
+++ b/PCbuild/tix.vcxproj
@@ -56,11 +56,9 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   
   <PropertyGroup>
-    <TkOpts>msvcrt</TkOpts>
-    <TkOpts Condition="$(Configuration) == 'Debug'">symbols,msvcrt</TkOpts>
     <TixDirs>BUILDDIRTOP="$(BuildDirTop)" TCL_DIR="$(tclDir.TrimEnd(`\`))" TK_DIR="$(tkDir.TrimEnd(`\`))" INSTALL_DIR="$(OutDir.TrimEnd(`\`))"</TixDirs>
-    <DebugFlags Condition="'$(Configuration)' == 'Debug'">DEBUG=1 NODEBUG=0 TCL_DBGX=g DEBUGFLAGS="-wd4456 -wd4457 -wd4458 -wd4459 -wd4996"</DebugFlags>
-    <DebugFlags Condition="'$(Configuration)' != 'Debug'">DEBUG=0 NODEBUG=1</DebugFlags>
+    <DebugFlags Condition="'$(Configuration)' == 'Debug'">DEBUG=1 NODEBUG=0 UCRT=1 TCL_DBGX=tg TK_DBGX=tg</DebugFlags>
+    <DebugFlags Condition="'$(Configuration)' != 'Debug'">DEBUG=0 NODEBUG=1 UCRT=1 TCL_DBGX=t TK_DBGX=t</DebugFlags>
     <NMakeBuildCommandLine>setlocal
 @(ExpectedOutputs->'if not exist "%(FullPath)" goto build','
 ')
diff --git a/PCbuild/tk.vcxproj b/PCbuild/tk.vcxproj
index 20749f719f5..589338cf5cf 100644
--- a/PCbuild/tk.vcxproj
+++ b/PCbuild/tk.vcxproj
@@ -60,8 +60,8 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   
   <PropertyGroup>
-    <TkOpts>msvcrt</TkOpts>
-    <TkOpts Condition="$(Configuration) == 'Debug'">symbols,msvcrt</TkOpts>
+    <TkOpts>ucrt</TkOpts>
+    <TkOpts Condition="$(Configuration) == 'Debug'">symbols,ucrt</TkOpts>
     <TkDirs>TCLDIR="$(tclDir.TrimEnd(`\`))" INSTALLDIR="$(OutDir.TrimEnd(`\`))"</TkDirs>
     <DebugFlags Condition="'$(Configuration)' == 'Debug'">DEBUGFLAGS="-wd4456 -wd4457 -wd4458 -wd4459 -wd4996"</DebugFlags>
     <NMakeBuildCommandLine>setlocal
diff --git a/Tools/msi/tcltk/tcltk.wixproj b/Tools/msi/tcltk/tcltk.wixproj
index e1addd9ed54..f66fc149884 100644
--- a/Tools/msi/tcltk/tcltk.wixproj
+++ b/Tools/msi/tcltk/tcltk.wixproj
@@ -27,13 +27,6 @@
             <Target_>DLLs\</Target_>
             <Group>tcltk_dlls</Group>
         </InstallFiles>
-        <InstallFiles Include="$(VCInstallDir)redist\$(Platform)\Microsoft.VC$(PlatformToolset.Substring(1)).CRT\vcruntime$(PlatformToolset.Substring(1)).dll">
-            <SourceBase>$(VCInstallDir)redist\$(Platform)\</SourceBase>
-            <Source>$(VCInstallDir)redist\$(Platform)\</Source>
-            <TargetBase>$(VCInstallDir)redist\$(Platform)\</TargetBase>
-            <Target_>DLLs\</Target_>
-            <Group>tcltk_dlls</Group>
-        </InstallFiles>
 
         <InstallFiles Include="$(tcltkDir)lib\**\*">
             <SourceBase>$(tcltkDir)</SourceBase>